Canon EOS 5D MARK IV, Instruction Manual

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The time information obtained from GPS signals can be set on the
camera. The margin of error is approx. ±1 sec.
1
Check the [GPS] setting.
Check that [ GPS ] is set to [ Mode 1 ]
or [ Mode 2 ].
2
Select [Auto time setting].
3
Select the desired setting.
Select [ Auto update ] or [ Set now ],
then press <
0
>.
[ Auto update ] updates the time when
the camera is turned on and a GPS
signal is received.
Setting Time from GPS on the Camera
If signals from at least five GPS satellites cannot be acquired, the time
cannot be auto updated. [
Set now ] will be grayed out and not selectable.
Even if [ Set now ] can be selected, updating the time may not be
possible due to an unfavorable timing of the GPS signal acquisition.
When [ Auto time setting ] is set to [ Auto update ], the date or time
cannot be manually set with [
5
2: Date/Time/Zone ].
If you use Wireless File Transmitter WFT-E7 (Ver. 2/sold separately) and
do not want to change the time after implementing [
Sync time between
cameras ], set [ Auto time setting ] to [ Disable ] in step 2.